Lubrication device



' Patented May 29, 1934 LUBRICATION DEVICE Carl B. Thompson and Otto B. Clark, South Bend, assignors to The Lubrication Corporation, South Bend, Ind., a corporation of Delaware Application June 27, 1932, Serial No. 619,436

3 Claims. (01. 285-144) This invention relates to improvements in lubrieter than the member 3 and each is formed with cation devices and more particularly to lubricant cylindrical side walls. The clamping member C is discharge nozzles oi the lubricant pressure oper-, tubular in major cross section and the inner ated clamp type. cylindrical wall thereof is arranged to slidably 5 .An object of the invention is to provide an imengage with the external wall of the conduit mem- 60 proved lubricant pressure operated, clamp type her 2 thereby providing an annular space between nozzle for delivering lubricant under pressure to a the wall 5 of the clamping member and the conlubricant receiving fitting upon which the nozduit member 3. zle is clamped wherein the lubricant pressure A cup shaped sealing washer 6, preferably conoperated clamping means must first function to structed of rawhide, is secured between the rear- 65 clamp the nozzle upon the fitting before lubricant ward end wall of the conduit member 2 and a under operating pressure may be present at the flange 'Z'formed integral with the conduit memdischarge orifice oi the nozzle. her 3 with its skirt extending rearwardly and en- Another object is to provide a lubricant disgaged with the inner wall 5 of the clamping charge nozzle of the character described wherein member C to form a lubricant tight seal between 7 I manual thrust applied to the external and rearthe member 2 and the clamping member 0. The ward end of the conduit may be directly imparted rearward end of the clamping member is proto the fitting engaging portion thereof to facilivided with an annular closure cap 8 encompasstate initial engagement and low pressure lubricant ing the conduit member 3 and secured to the p seal between the nozzle and the fitting. clamping member ,by threaded engagement as 7 Other objects, the advantages and uses of the shown at 9. Anannular sealing member 1l,which invention,willbe,orshould become apparent after may also be of rawhide, is secured between the reading the following description and claims and cap 8 and a washer 12 bearing upon the end after consideration of the accompanying drawwall of the clamping member and is formed with ing formingapart of this specification, inwhich: a forwardly extending tubular portion 13 en- Fig. 1 is a sectional view of a lubricant disgaged with the outer wall of the conduit member charge nozzle constructed in accordance with our 3 to form a seal between the conduit and therearinvention shown as initially engaged with a lubriward end of the clamping member.

cant receiving fitting; There is thus former? of the annular space lee- Fig. 2 is a view similar to Fig. 1 illustrating tween the conduit and the inner wall of the the nozzle clamped upon the fitting; and clamping member C a fiuid tight chamber. 15 5 Fig. 3 is an end elevation of the discharge which when lubricant under pressure is admitted nozzle. thereto may expand by relative movement be- In general, the pressure operated clamp type tween the clamping member C and the conduit A.

nozzle selected for illustration herein comprises, a in that direction to cause the clamping Jaw D to 90 conduit A having-a discharge orifice B at one approach and engage with the head 16 of the end the walls of which are adapted for engagelubricant receiving fitting N when in registrament with the head of a lubricant receiving nipple tion with the discharge orifice B.

or fitting N to establish a seal therebetween and To assure operation of the clamping member 0 having its other end adapted for connection to awith .its jaw D to clamp the nozzle upon the head Pressure feed Source lubricant Supply, a mp-' of the fitting prior to subjecting the discharge n member 0 slidably m u p e orifice of the nozzle to operating pressure, lubridui A p v d d wi a pp r fitt n ga ng cant is first admitted to the chamber 15. through jaw D and l i n pr ure Operated mechathe rearward portion 17 of the tortuous passage m'sm in ludi m a s a d d y forming h E of the conduit which communicates with the o d A with a t u p sa E f m vin chamber through the medium of a right angle h l mp m m l iv to h nd it o turn 18 in the passage portion 1'7, the mouth of clamp the nozzle upon the headset the fitting which is disposed on one side wall of the conduit N prior to building up a substantial operating member 3. A similar right hand turn 19 is formed '50 pressure at the discharge orifice B. in the forward portion 20 of the passage E hav- 1105 Referringparticularly to Figs. 1 and 2, the coning its mouth located on the opposite side wall of duit A comprises a pair of aligned members 2 the conduit member-3. Lubricant must therefore and 3 secured to one another by threaded engageenter the chamber 15 to fill the chamber before ment as show'nat 4. The member 2 or discharge it may be urged into the forward portion of the end of the conduit is of greater external diampassage. E, the mouth of which is located on the opposite side of the chamber. The portion of the passage E communicates directly with the discharge orifice B.

A stud screw 21 extends through the wall of the clamping member C and into a longitudinally disposed slot 22 formed in the outer wall of the conduit member 2 to prevent relative rotary movement between the conduit and-clamping member, thus properly aligning the clamping jaw D and the discharge orifice B. Theslot 22 is sufficiently long to permit the necessary relative longitudinal or axial movement of the members as in clamping and unclamping the nozzle to and from the head of the lubricant receiving fitting. The clamping jaw D is of the general type illustrated and described in the United States patent to Herlihy, Reissue No. 18,288.

In operation the lubricant discharge nozzle may I be connected to the discharge port of any suitable type of pressure feed lubricant pump or dispenser as by means of a fiexible lubricant conducting hose 25 having an end fitting 26 engageable with the externally threaded end 27 of the conduit A.

It is desirable that some form of control valve be included in the discharge line of the pump or dispenser to shut off lubricant fiow as between servicing operations. In applying the nozzle to the head 16 of the fitting N, the operator may move the nozzle to bring the discharge orifice B into registration with the head of the fitting with the adjacent walls of the orifice in contact with the surface of the head to form a contact seal'therebetween. He may next admit lubricant to the nozzle by opening the shut off or control valve of the pump or dispenser whereupon lubricant under pressure may flow through the portion 17 of the conduit passage E into the chamber 15 to expand the chamber by forcing the clamping member C and conduit A to move relative to one another to the position shown in Fig. 2, thus causing the clamping jaw D to engage with and clamp the conduit securely upon the head 16 of the fitting 'N. As the lubricant pressure acts to expand the chamber 15, lubricant unde pressure will be urged from the chamber 15 into the forward portion 20. of the passage E where it may passthrough the discharge orifice B into the fitting N.

The nozzle will remain clamped upon the fitting head as long as lubricant under pressure is present in the chamber 15 and the clamping force applied will bear a direct proportion, to the lubricant pressure. It, therefore, becomes necessary to shut off the fiow of lubricant to the nozzle prior to unclamping the nozzle, which function may be carried out by drawing rearwardly upon the conduit A or hose 25 to cause relative movement between the clamping member and the conduit pursuant to the position shown in Fig. 1.

It is to be understood that the embodiments of the invention herein set forth are presented for the purpose of illustration only, and various changes may be made without departing from the spirit of the invention and the scope of the appended claims.

We claim:

1'. A clamp type lubricant discharge nozzle comprising, a conduit having a discharge orifice at one end, a tubular member slidably mounted upon said conduit, the outer and inner walls of said conduit and said tubular member being so formed as to provide an annular chamber therebetween of varying capacity upon relative longitudinal movement of said tubular member and said conduit, means for rendering said chamber fluid tight, a clamping jaw arranged to clamp the discharge end of said-conduit upon a lubricant receiving fitting upon relative movement of said tubular member and said conduit to expand said chamber, and means for connecting the inlet end of said conduit to a source of lubricant supply, the lubricant conducting passageway of saidconduit being formed in two parts the adjacent ends of which communicate with said annular chamber.

2. A clamp type lubricant discharge nozzle comprising, a conduit having a discharge orifice at one end, a tubular member slidably mounted upon said conduit, the outer and inner walls of said conduit and said tubular member being so formed as to provide an annular chamber therebetween of varying capacity upon relative longitudinal movement' of said tubular member and said conduit, means for rendering said chamber fluid tight, a .clamping jaw arranged to. clamp the discharge end of said conduit upon a lubricant receiving fitting upon relative movement of said tubular memin two parts the adjacent ends of which communicate with said annular chamber upon, opposite side walls of the conduit. I

3. In a clamp type lubricant discharge nozzle, means providing. a discharge orifice, a clamping jaw in operative registration with said orifice, means providing a chamber expandible under the influence of lubricant pressure for causing relative clamping movement between said jaw and the walls of said discharge orificeto clamp a fitting, therebetween, means providing a lubricant induction passageway terminating within said chamber, and means providing a lubricant passageway between said chamber and said discharge orifice, the mouths of said passageways communicating with said chamber facing in opposite directions away from one another to cause a circulation of lubricant admitted through the first named passageway through said chamber prior to admission to the second passageway.

- CARL B. THOMPSON.

O'I'IO B. CLARK. 

